727 



:H<r, hibernation of larva;, 73. 



Saussure, DC, on Siredon Mexi- 

 canus, 565, 602 ; physical cha- 

 racter of Mexican Like, 603. 



Saw-flies, protective habits of larva?, 

 290. 



Schmnnkcwitsch, transformation of 

 Arti-miii. 635. 



Schmidt. Oscar, on convergence of 

 character, 396, 459 ; on variability, 

 654. 



Schrcibers, sexual Triton larvae, 

 591 ; arrested tadpoles, 607. 



Schulze, F. E., parasitism in 

 Mfdiistr, 699. 



Science, function of, 640. 



Scuddcr, S. H., embryonic larvae of 

 butterflies, 166. 



Seasonal dimorphism, origin and 

 significance, I ; seasonal change 

 of colour in animals, 7 ; and 

 climatic variation, 45 ; seasonal 

 adaptation in caterpillars, 305. 



Scidlitz, reproduction of Axolotl, 

 571 ; white var. of hare, 662. 



Selenia tetralunajria. S. illunaria, 

 S. lunar fa, and S. illustraria, 

 seasonal dimorphism, 4. 



Semper, C., origin of alternation of 

 generations. 84 ; transformation 

 of Amblystoma mavorliunt, 629. 



Semper, G , young Sphinx-larvae, 

 166 ; figures of caterpillars re- 

 ferrcd to, 522. 



Senses, physiology of. 711. 



Sepp, figure of caterpillar referred 

 to. ?62. 



Sesiida, affinities of, 370. 



Sexual dimorphism, of butterflies, 

 32. 250; of caterpillars. 308, 527, 

 534 ; secondary sexual characters, 

 62 ; sexual selection, 69, 102. 



Siebold, Von, on Pulmonifera, 590. 



Siredon. S. Mericanus, habits, 

 565 ; S. lichenoidts, transforma- 

 tion, 567, 630 ; phyletic advance 

 of genus, 584 ; retention of genus, 

 610 ; S. tigrinus from L. St. 

 Isabel, 626. 



Slater, J. W ,food of gaily coloured 

 caterpillars, 294. 



unthus ; larvae of, 232 ; S. 

 'lilitr, 233; 4th stage, 235; S. 



/V///, 236 ; and stage, 237 ; 

 3rd and 4th stages. 238 ; 5th 

 st;i^c. 239 ; S. oceltatus, 240 ; 

 dimorphism of larva, 241 ; .V. 

 Tilue, variable in two stages, 

 405 ; North American species of, 

 453. S. tatarinovri, and A. 

 ptanus, larva?. 244. 



Species, causes ot transformation 

 of, i\(> ; nature of 671. 



Specific characters, 91 ; may 

 originate through direct action, 

 ico. Specific constitution, 112. 



Spencer, Herbert, theory of descent, 

 64; ; variability, 654 ; law of 

 growth. 655. 



Spermatozoa, of Amblystoma. 593 ; 

 of Lissotriton punctatus, 595. 



Speycr, Dr., seasonal dimorphism 

 of moths, 4 ; of P. p/ilteas in Ger- 

 many, 50. 



Sphingidcr, oviposition, 164 ; con- 

 gruence and incongruence in 

 genera, 450. 



S/M/.r-markings, ontogeny and 

 morphology, 177. Larvae of 

 genus, 259 ; S. Convolvuli, 650. 

 Origination of markings, 273 ; 

 law of development, 274 ; forms 

 of markings. 309. 5. Ligustri, 

 constant in three stages, 405. 



Stainton. H. '!'., larval characters 

 ol Notodontida, 443 ; young larvae 

 of Triph.pronuba, 520. 



Staudinger, Dr., seasonal dimor- 

 phism of Euch. Bella and E. 

 Ausonia, 3, 48 ; butterflies of 

 Finnmark, 20 ; P. Napt var. 

 Bryonite from Lapland. 44, 49 ; 

 larva? of Ch. aiecto, 193 ; affinities 

 of Nymphalis and Apatura, 438 ; 



Stauropus Fagi, protective habits 

 of larva, 290. 



Sterility, causes of, 596 ; a result 

 of reversion, 597 ; law of, in 

 reversion forms. 599. 



Stoat, seasonal change of colour, 7. 



Strauch ; " Revision of Salaman- 

 dridir * referred to, 570. 577. 



Strecker, H., N. American species 

 of Smcrinthus, 453. 



Stripes, longitudinal, 312, 372 

 oblique, 317, 373. 



